Brake mechanism for railway cars



' 1 1 July 9 927 P. B. CAMP BRAKE MECHANISM FOR RAILWAY CARS Filed May 21, 1923 Patented July 19, 1927.

lenteur ounce AMACHMENT Company, A

,BRAKE hemmen Foe emv-evene Application vlerl May v21,

Proper application `of brakes requires a quick'!t'ake-up of the slack lfollowed by powerful application of pressure of shoes' and tlierfoijce available for the Work is limited.V The principalobject of .this invention is t0 equip ybrake mechanisms with a lever device that will first multiplythe lspeed of the applied forceand tlie'nmultip'ly l'the povv'er of that torce with reduced speed. i Cth-er' objectsalnd advantages of lthe invenftion will become apparentes the description Yis 'read in connection Withthev accompanying drawings in which Figs.' 'l and 2"'are sile `elevation and -iplan `View" respectively; illustrating the brake melixanism at one 'end ofthe car*equipped according tof the present invention; l

Figs. 3 are sileelfevation andfplan View 'respectively of the multiplied Llever .device its lmounting `shovvn in an 'enillfrldclll v l "ilie shoes areshOvvn at l() lmounted on bigalief'beams 11 carried bysuspendin'g links 12 lffi'olmjany "suitable supporti The wliieh are "connecten ttor" `joint operation by aflinlrgl. 'lllhepovver transr'n'i-tteillto the' levier i3 either from lG'oi-"a brake 11.7 `through a" rocl i18, and ja "brake pinQOtofapusli ifodlQl ,thatiis operated Vhy a 'riefen'. in thee/flieder 16 Th lewe' vPi'n connects the lever 149 4toa rod orth'e :like that is operated by the brake 1'7 through a ivinding'chain 48. Allthisstru'cture isold anti "vvellh'lnovvnn'and is selectegl ner-ely i0 @1.ii1Sh-m0e application of @he preseitlweriiien.-

Thwmi1p1y1na t betweenthehgand llj'irale'roel 22fand the'lever 19'. The @1129 "eellets 5119619122310 the lever 119 and' the sliajclzle connecteijl toa forked' n'lounting 24 Vin which lthe multiply-v ing leveris `rotatably `npiountedv on the 'pintle bolt 25, "vvhere'byv s'ail frnultiplying A,lever is supported principally vfrom said push roel' 2l While in inoperative position. v Y

The 4lever is `equipped with two arms and 27,' lthe former being connected by a chain 28 with the han Ebrake rod 'and the latter by a chain'l'29 with an anchorage 30 on tlieuntler frame oftllieicar. n

These arms 26 and "afrejarnanged to take advantage o't-he fact that 'a point travcling in a circle will, in `onjearc moveprin` lever is here interposed 1923. 'Seriali No. `:$40,402. V

cipally inone directiom-and in another arc norm-al `traveling position. 'and the'uline B2 gindicates @the length `of lthe 4armA 26.y (Duetto ltheflocationof thei'a'rms with respect lto-the v chains 28 and 29, a. slight'movement' of the chain A@Savill cause the 'lever to rotate rapidly `anal fthe -pintle 'F25 to "travel, nrapidly Lto the right Ainthe drawing.Y vThis `is because a;

very -slight movement 'to the right onthe partoifthefchain 28Will .cause :theline 321.0 1

revolve clockwise thiough a V`consiCleraible angle', KLwhich.revolution vviill also be taken bythe armgQZ, hutthe'point "34 on the line 82 will move principally transverse to the movement of the chain-28; lWhereasithe similar point on Ltherarm 27 'Wi-ll move :prim cipa'glly 'in the direction of the force atransmittetl T-to the `chain fGonsequently, a slight rotation gof lthe lbrake staff 1-7 servesV tod'otate-the lever move 'itltogetlier fwifi'h the mounting 24 5to the dotted '-.line position shown in Figi 3, which issuicient lto ytake up tlie-slacknthe average `.brake gear. l

Further 7movement of the chain '28 to. .the

right, due tothe change of relation of the point B4, Willicause thefrn-ultiplying lever to* rotate slowly "but the i chain will op erateV with correspondingly increased leverage; 1 and 4-iu adtlition theposition 'of 'the-point 35 relative to the direction `of'the force transmitte'fl to Vthe chai-nl29 =vv-ill ihave' `also changed 'so as to increase the mechanical advantage roiE the lever device. i 'f -It is necessary lto provide l'the application of the Qbrake pressure throug'h'l a considerable range `and this may v'be 'accomplishedby`r equipping the armlfQf with vthe drumslike Working` surface B6 l and the arm '-27 with the drum-like WorkingV surface `37. yThe Ztlrum `surface y36 ser-vesto continue UlieaPm'QGlandlongy leverage through a Wide angle of ro tation and the drum sniff-ace 37 continuesth'e armQT With'sliort leverage througlra similaifangled-rotation.

rBy 'varying the jifelatve position of the line32 and arm -27 -thegtakelup can be 'Iva- `rielto suit'different-conditions. VVherelonly agsma-llam'ount of slack is toheta'lienup it maybe 'found suflicient to make use Ofth-e speed gaineilbyeither the QGorthe arm 2f7iand'in'thatcase one of the arn'is; may the form of ra; complete drum. Where a. :g1-eater amount of Y slack is to be 'taken up it may be accomplished by a change inthe length ot the arms or by an obvious change in the relationship between them and the applied and transmitted forces.

A particular construction here shown permits the arm 26 to be made in the form ot a sector having` a substantially radial leading face grooved along the line 32 and along the drum surta-ce to receive the chain 2S, one end of which is secured by a shackle 39 to the following face et() ot the arm and the other end of which is secured to the free end of the rod 22. And the arm 27 is a relatively short projection which is continued in the drum surface 37, both being grooved as at 33 to receive the chain 29.

Due to the multiplying effect of the lever device, the torce transmitted from the arm 27 is much greater than that applied to the arm 26 and for that reason the pin el, by which themounting 24 is connected to 'the shackle 23, is oi'l'set to the side corresponding to the arm 27. This may be accomplished by making the fork in the mounting a little one-sided, or otherwise, as may be desired.

I claim as my invention:

l. In a brake mechanism for railway cars, a brake, a power device for operating the brake and an extensible and contractable connection between them including` a rotatably mounted multiplying lever having two laterally spaced arms, one of said arms being in the form of a segment having a substantially radial leading face, means for connecting saidsegment to said power device, said means engaging saidleading face during the initial movement of said power device, means for connecting the other arm to an anchorage and means including a pivot for rotatably mounting the lever and transmitting force therefrom to the brake.

2. In a brake mechanism for railway cars, a brake, a power .device for operating the brake and an extensible and contractable connection between them including a rotatably mounted multiplying lever having two laterally spaced arms, means including al pivot for rotatably mounting the lever and connecting it to the brake, one ot said arms having a segmental drum surface ot long leverage and having a substantially radial leading face, a cable cooperating with said drum surface and connected with the power device, the other arm having a drum surface of short leverage and a radially extending projection, and a cable secured to said projection and connected with an anchorage.

3. In a brake mechanism `tor railway cars, a brake, a power device for operating the brake, andan extensible and contractable connection between them including a rotatably mounted multiplying lever having two individual arms, one of said arms being segmental, and having a substantially radial leading face, a cable connecting the other Voi" said arms with an anchorage, a mounting in which the lever is journaled and which is adapted to travel transversely to the axis ot rotation of said lever when the brake is f applied, and a cable connecting the segmen- -to an anchorage and means :tor connecting the other arm to theV source of power, said means engaging said radial tace during the initial operation of said brake mechanism,r

said arms being so arranged that said leading tace will first move in a direction principally transverse to said means, and then in a direction principally parallel therewith, and the other arm will first move principally in a direction parallel with said means, and then in a direction principally transver-se thereto during the application of the brakes. f

5. In a brake mechanism for railway cars, the combination of a brake lever, a source of power, and an expansible and contractable connection between them including a lever having two individual arms, one arm being provided with a segmental drum surface of long levera e and having a leading face spaced angu arly lfrom the other arm, a cable cooperating with the segmental drum surface and engaging said leadingl face in the inoperative position ot' said lever, said cable being connected with the power device, and a cable connecting the other arm with an anchorage. V

6. In a brake mechanism for railway cars, a brake, a' power device for operating the brake and an expansible and contractable connection between them including a traveling mounting, a rotatable multiplying lever journaled inthe mounting and having two individual arms, one of said arms bein in the form of a segment having a substantially radial leading face, a connection between the mounting and the brake, a connection between one of said arms and the power device and a connection between the other arm and an anchorage, said arms being so arranged that said leading tace will first move in a direction principally transverse to said connection, and then in a direction principally parallel therewith, and the other arm will irst move principally in a direction parallel with said connection and then in a direction principally transverse thereto, during the application of the brakes.

7. In a brake mechanism for railway cars,

a brake, a lever for operating said brake, means including a push rod for operating said lever, a brake staff, an expansible and contractable connection between said staif and lever for manually operating said brake, said connection comprising a traveling mounting supported principally by said push rod, a rotatable multiplying lever journaled in said mounting and having two individual arms, means for transmitting force from the mounting to the brake, means for transmitting force from the power device to one of said arms and means for connecting the other arm ywith an anchorage, the first arm being arranged to first move principally in a direction transverse to the applied force.

8. In a brake mechanism for railway cars, a brake, a power device for operating the brake and an expansible and contractable connection between them including a traveling mounting, a rotatable multiplying lever journaled therein and having two individual arms, means for transmitting force from the mounting to the brake, means for transmitting force from the power device to one of said arms and means for connecting the other arm with an anchorage, the last arm being arranged to first move principally inV a direction parallel to the force transmitted to the anchorage for taking up the slack, and then transverse thereto for setting the brakes.

9. In a brake mechanismv for railway cars, the combination of a multiplying lever having'two laterally spaced arms arranged to make the force transmitted bv one of them greater than the force applied by the other, a mounting in which the lever is journaled and means for transmitting force from the mounting connected thereto in an oH-set position corresponding to the diiference between the applied and the transmitted forces. i

' PERCY B. CAMP. 

